Heating-stove.



No. 640,663. Patented Ian. 2, I900. W. J. KEEP &. W. V. ROBINSON.

2 Sheets$heet I.

(No Model.)

vIVIIUVE'SES No. 640,6 63. I Patented Jan. 2, I900.

J. KEEP & W. V. ROBINSON.

2 Shuts-Sheet 2,

(No Model.)

000 can 000 00.1

IDDDDD N IIIZWESSES Tm: aomus PETERS cu, wmourua. WASHINGTON. n. c.

' UNITED STATES- .IATENT men.

l/ VILLIAM J. KEEP AND WILLIAM V. ROBINSON, OF DETROIT, MICHIGAN, ASSIGNORS TO THE MICHIGAN STOVE COMPANY, OF SAME PLACE.

H EATING-STOVE.

SPECIFICATION forming pew r Letters Patent No. 640,668, dated January 2, 1960'. Application filed August 13, 1897. Serial No. 648,093. (No model.)

To all whom it may concern.-

Be it known that We,WILLIAM J. KEEP and WILLIAM V. ROBINSON, citizens of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Heating- Stoves; and we declare the following to be a full, clear, and exact description of the in vention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to stoves, and has for its object improvements in that class of stoves which are especially adapted to be used for burning soft coal in which the combustionchamber or fire-pot in which the coal is held during the progress of combustion is externally exposed. In stoves of this character there is usually a combustion-section or fireheated the heat generated by the fire is trans ferred to the air in the room directly, and as the tendency of heated air is to rise the radiation from the stove into the room takes place principally from that part of the stove which is above the fire-pot, and the lower part of the room is not heated as much as is desirable.

Many eiforts have been made to construct a stove made as above described with a fine leading to the base, so as to produce a baseheating stove; but in the attempts that have been made portions of the direct-heating surface of the stove have been so covered in by the diving-flue that the gain was small, and also when the flue was placed against parts that were exposed on the other side to the direct action of the fire such parts were soon burned through, especially those parts which were in direct contact with the coal. In the stove embodying our invention we have combined with the base and flue leading from above the fire-pot, so arranged that all surfaces are left uncovered or exposed the same as when no flue is used, and the stove combines, in addition to the heating-surface heretofore used, additional heating-surface equal in extent to the external surface of the flue, and the base around the ash-pit is also used as heatingsurface, which not only increases the surface of radiation, but places it lower on the stove than has heretofore been possible with the class of stoves referred to. There are several other incidental features of improvement in the stove which will be described and claimed; I

In the drawings, Figure 1 shows the stove in perspective. Fig. 2 is a diagonal vertical section through the stove. The upper part of the stove above the smoke-exit is not shown in this figure. Fig. 3 is a detail of the damper-actuating device. Fig. 4: is a perspective of the fire-pot and its immediate connection. Fig. 5 is a detail of the guard used at the front top edge of the fire-pot to prevent cold air from blowing down the flues when the door of the stove is opened.

A indicates the base, B the fire-pot section, and O the section above the fire-pot section, into which opens the feed-door D.

E indicates the smoke-pipe, and F F the return or diving fiues.

The base A is made with a central chamber a, closed in front by a door a and separated from the chamber 1), which lies at each side and at the rear of the central chamber A, by a partition-wall b. The central chamber a is intended as the ash-pit, and within it is received the ash-pan p.

The fire-pot B is substantially round in horizontal cross-section in accordance with the form of fire-pots of this class of stoves.

Immediately surrounding the upper edge of the fire-pot is a chamber 2, that extends in the form of a broken or partial ring that extends around the back of the stove and on each side of it to near the opening for the feeddoor. The ends of this chamber are closed. Its inner wall is perforated with numerous air-inlet holes of small size. Its outer walls are perforated with two damper-closed openings, one opening lying at each side of the stove. joints, but in two or more pieces with vertical joints 2.

At the front between the ends of the curved chamber just described, between the end of the chamber and the door-openingfis an opening leading into diving-fines F F. Each of the diving-fines F F consists of a pipe leading downward to and into the chamber 5.

p The pipe of the flue F or F sets out from the body of the stove, so as to be entirely separated therefrom, except at the points where it leads out from the chamber above the firepot and into the chamber around the ash-pit.

The smoke-exit pipe leads from the chamher 6 at the rear of the stove and leads up parallel with the axis of the stove, having a direct-draft inlet near the top of the stove, which is normally closed by a damper 01. This damper is arranged to be actuated by a series of crank-levers (indicated in Fig. 3) so arranged that the opening of the door D opens the damper d. In order that this result may be brought about, the damper d is hung on pins on its horizontal axis. One of the pins 3 is bent in crank form and engages with a link 3". The other end of the link engages with the cranked terminal of a rock-shaft 3", the front end of which projects through the stove and terminates with a crank-arm that engages over the door D just forward of its hinge-line. The body of the rock-shaft 3 is bent so that it follows the side of the stove in its course from the front to the rear of the stove. The opening of the stove actnates the damper d and throws it open, so that there is direct entrance into the smoke-exit pipe when the door is open, and the damper falls by gravity when the door is closed, so that the products of combustion are compelled to pass downward to the base of the stove on their way to the smoke-exit pipe when the door is closed. If it be desired to have direct draft-as, for instance, when the fire is new the rock-arm 3 is turned a half-revolution, and the damper will be thrown open and remain open.

At the front of the fire-pot, below the door D, is a guardapron 5*, the ends of which project inward and partially cover the front and upper side of the opening into the down- The ring is made without horizontal or scattered around about three-fourths of the stove, is practically heated, and finally mingles with the nnconsumed gases above the fire-pot, to which it is admitted through the numerous small holes in the interior of the chamber.

The chamber 0 is walled with sheet-iron, and in order that the joint between the sheetiron and the castdron-walled chamber 2 may be sumciently tight and firm we use above the chamber 2 a cast-iron ring R made in two or more pieces that project above the seat 5 on top of the chamber2 fora distance, so that the sheet-iron wall of the chamber 0 may fit down over the cast iron ring into the seat 5.

All the joints are made with cups, into which the ends of the joining pieces set, so that the joints all remain tight or approximately tight even if there be considerable in equality of expansion in the adjoining pieces.

6 indicates clean out doors that lead through the outer walls of the base and permit easy access into the base at the bottom of the tines F F.

What we claim is- In a stove of the character described in combination with the fire-pot, the chamber above the fire-pot provided with a feed-door opening, and its door, the diving-fines F, F and a guard 5 located below the door, and partially covering the openings into the down draft-lines, substantially as described.

In testimony whereof we sign this specification in the presence of two witnesses.

WILLIAM J. KEEP. WILLIAM V. ROBINSON.

Witnesses:

Isaac S. FILER, J. EDWIN ELLIS. 

